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Asian Journal of Crop Science
eISSN: 2077-2041
pISSN: 1994-7879

Editor-in-Chief:  Arvind Singh Tomar
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Research Article
Effect of Chemical Insecticides on the Arthropod Diversity in the Agroecosystem of Red Onion Crops
Arfan , Alam Anshary, Zainuddin Basri and Hibban Toana
Background and Objectives: The diversity and abundance of arthropods in the local red onion agroecosystem of Central Sulawesi are important aspects in ecosystem resources and preservation. This study aims to analyze the effect of insecticide application on arthropod diversity in the agroecosystem of red onion crops. Materials and Methods: It is an experimental study which used 500 m2 of plot divided into two separated plots. Each plot is 250 m2 and has 300 m space between the plots. The first plot was intended for abamectin insecticide application and the second plot was intended for no application of insecticides. The observation of diversity and abundance of Arthropods was performed by conducting 5 sampling times. Results: There were 7 orders of Arthropods found in the ecosystem of red onion crops without insecticides, which included 29 families and 42 species with a total of 4,412 individuals. In red onion crops with insecticides, there were 8 orders found, which included 22 families and 31 species with a total of 12,078 individuals. The individuals found were Hemiptera, Diptera, coleoptera, hymenoptera, lepidoptera, Arachnida, Orthoptera and heteroptera. The diversity index of red onion croppings area with insecticides was 2.06 and of which without insecticides was 1.28. Conclusion: The application of insecticides has an effect on the diversity and abundance of arthropods on red onion crops. The values of diversity index, number of family and species were higher in the red onion ecosystem without the application of insecticide.
Research Article
Effect Type and Levels of Manure on Forage Production and Nutrient Quality of Sorghum (Sorghum bicolor (L.) Moench) Plant
Liman , Agung Kusuma Wijaya, Syahrio Tantalo, Muhtarudin , Septianingrum , Widya Puspa Indriyanti and Kusuma Adhianto
Background and Objective: The high price of chemical fertilizers encourages the use of livestock manure as a replacement, the use of various types and dosage of cattle dung on sorghum plants will have an impact on the production and quality of forage, it was necessary in order to use it as ruminants feed. This study aims to determine the type and level of manure on the productivity and nutritional value of sorghum. Materials and Methods: The design used in this research was split plot design with the basic design of complete randomized design. The main plot: Consisted of type of manure i.e., goats, cows and chickens (K1, K2 and K3). Subplot consisted of dose use of manure (t ha–1): 0, 15, 20 and 25, each treatment was repeated three times. Each plot measuring 2×1.8 m2. Parameters measured include the production of fresh forage, nutrient content (protein, crude fiber, acid detergent fiber, netral detergent fiber). The data were analyzed by analysis of variance. Results: The results of analysis of variance showed that the type of manure was not significant (p>0.05) to the production of fresh forage sorghum, but the level of manure doses significantly (p<0.05) to fresh forage sorghum production. The highest yield obtained at a rate of fertilizer 25 t ha–1 (R3), i.e., 57,250 t ha–1. The results were not significant (p>0.05) to the proportion of sorghum stalks and leaves of plants. in the parameters nutrient content, the study showed significant effect on the water content and crude protein, while not significantly affect on crude fiber and netral detergent fiber content of sorghum. The highest yield in sorghum protein content (11.13%) contained in the fertilizer treatment cow manure at a dose of 25 t ha–1. Conclusion: The results showed that the highest production of sorghum forage and protein content was obtained at doses of fertilizer was 25 t ha–1.

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